JP5081513B2 - Indexing device for machine tools - Google Patents

Indexing device for machine tools Download PDF

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Publication number
JP5081513B2
JP5081513B2 JP2007175080A JP2007175080A JP5081513B2 JP 5081513 B2 JP5081513 B2 JP 5081513B2 JP 2007175080 A JP2007175080 A JP 2007175080A JP 2007175080 A JP2007175080 A JP 2007175080A JP 5081513 B2 JP5081513 B2 JP 5081513B2
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Prior art keywords
housing
unit
motor
rotary shaft
support head
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JP2009012102A (en
Inventor
好教 辰田
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Tsudakoma Corp
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Tsudakoma Industrial Co Ltd
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Priority to JP2007175080A priority Critical patent/JP5081513B2/en
Priority to TW097120732A priority patent/TW200902221A/en
Priority to PCT/JP2008/061888 priority patent/WO2009005051A1/en
Priority to KR1020097025424A priority patent/KR101362830B1/en
Priority to CN2008800128506A priority patent/CN101687291B/en
Priority to US12/602,849 priority patent/US8579560B2/en
Priority to EP08777739A priority patent/EP2168713B1/en
Priority to AT08777739T priority patent/ATE553878T1/en
Publication of JP2009012102A publication Critical patent/JP2009012102A/en
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Publication of JP5081513B2 publication Critical patent/JP5081513B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/52—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
    • B23Q1/5406—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed perpendicularly by a single rotating pair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • B23Q16/06—Rotary indexing
    • B23Q16/065—Rotary indexing with a continuous drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2210/00—Machine tools incorporating a specific component
    • B23Q2210/004—Torque motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y10T409/307672—Angularly adjustable cutter head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30784—Milling including means to adustably position cutter
    • Y10T409/308512—Compound angular adjustment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309296—Detachable or repositionable tool head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309352—Cutter spindle or spindle support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/14—Rotary member or shaft indexing, e.g., tool or work turret
    • Y10T74/1494—Locking means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Motor Or Generator Frames (AREA)
  • Machine Tool Positioning Apparatuses (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Gripping On Spindles (AREA)

Abstract

An index device for a machine tool includes a rotary shaft (40) to which a drive object is attached, a housing (30) surrounding the rotary shaft (40), a bearing (B1, B2) secured between the housing (30) and the rotary shaft (40) by a securing member (30b), and drive means (M) provided around the rotary shaft (40) and including a rotor (M1a, M2a) and a stator (M1b, M2b). The stator (M1b, M2b) is attached to the housing (30) and the rotor (M1a, M2a) is attached to the rotary shaft (40). The rotary shaft (40), the bearing (B1, B2), the rotor (M1a, M2a), and the securing member (30b) are connected together to form a built-in unit (22). A casing member (30a, 31a) of the housing (30) and the stator (M1b, M2b) are connected together and a cable (c11, c11) for the stator is led out from the side opposite the securing member (30b) to form an enclosure unit (21). The built-in unit (22) is connected to the enclosure unit (21) such that the built-in unit (22) can be inserted into and extracted from the enclosure unit (21), thus facilitating connection and disconnection of wiring between the stator of a DD motor mounted in a spindle head of a machine tool and a main body of the machine tool.

Description

本発明は、工作機械用の割出装置、特に、五軸加工機（同時五軸制御可能な加工機）等の複合加工機に使用されるスピンドルヘッド(本明細書でいう加工用ヘッドに相当する)の工作機械用の割出装置に関する。
The present invention relates to an indexing device for a machine tool, in particular, a spindle head (corresponding to a machining head referred to in this specification) used in a multi-tasking machine such as a 5-axis machine (a machine capable of simultaneous 5-axis control). on the indexing device for a machine tool of the).

工作機械用のスピンドルヘッドとしては、ツールを回転駆動するスピンドルユニットを両側で支持しつつＡ軸周りに回転駆動するフォークと、このフォークをＣ軸周りで回転駆動する駆動部（以下、Ｃ軸駆動部という。）とを備えたものが知られている（特許文献１）。
米国特許第５５８４６２１号明細書 A spindle head for a machine tool includes a fork that rotates around the A axis while supporting a spindle unit that rotates the tool on both sides, and a drive unit that rotates the fork around the C axis (hereinafter referred to as C axis drive). (Referred to as patent part 1).
US Pat. No. 5,584,621

上記Ｃ軸駆動部は、フォークに固定された内側スリーブを含む回転軸、回転軸（内側スリーブ）を回転自在に支持するための軸受、回転軸を回転駆動するための駆動モータを含み、これらをハウジング内に収容している。また、上記駆動モータは、回転軸に固定されるロータ（モータロータ）と、ロータを囲繞する配置でハウジングに固定されるステータ（モータステータ）とからなっている。即ち、特許文献１におけるスピンドルヘッドのＣ軸駆動部は、その回転軸を駆動するために直接駆動型のモータ（俗にＤＤモータと言われる）を採用している。さらに、この駆動モータを構成するロータ及びステータは、回転軸の一部と共に、その外周及び上下の三方を囲まれた状態でハウジング内に収容されている。そして、Ｃ軸駆動部は、駆動モータによって回転軸（フォーク）を所定の角度位置へ向けて回転駆動する割出装置として機能する。   The C-axis drive unit includes a rotation shaft including an inner sleeve fixed to the fork, a bearing for rotatably supporting the rotation shaft (inner sleeve), and a drive motor for rotationally driving the rotation shaft. Housed in a housing. The drive motor is composed of a rotor (motor rotor) fixed to the rotating shaft and a stator (motor stator) fixed to the housing in an arrangement surrounding the rotor. That is, the C-axis drive unit of the spindle head in Patent Document 1 employs a direct drive motor (commonly referred to as a DD motor) in order to drive the rotating shaft. Further, the rotor and the stator that constitute the drive motor are housed in the housing in a state of being surrounded by the outer periphery and the upper and lower sides together with a part of the rotating shaft. The C-axis drive unit functions as an indexing device that rotationally drives the rotary shaft (fork) toward a predetermined angular position by a drive motor.

ところで、上記のスピンドルヘッドにおけるＣ軸駆動部は、割出装置として工作機械に組み付けられて工作機械の一部を構成するものであり、一般には、そのハウジング（フレーム）に相当する部分を工作機械の所定箇所に取り付けることによって工作機械に支持され、使用される。また、特許文献１には記載されていないが、上記のような割出装置は、回転駆動対象部材（上記スピンドルヘッドにおけるフォーク等）の角度位置を割り出した後にその角度位置を保持するためのクランプ機構が一般的に組み込まれている。
By the way, the C-axis drive unit in the above spindle head is assembled to a machine tool as an indexing device and constitutes a part of the machine tool. Generally, a portion corresponding to the housing (frame) is a machine tool. It is supported and used by a machine tool by being attached to a predetermined position. Moreover, although not described in Patent Document 1, the indexing device as described above is a clamp for determining the angular position of a rotation drive target member (fork or the like in the spindle head) and holding the angular position. The mechanism is generally incorporated.

工作機械の使用によって一定期間経過すると、上述の割出装置内における軸受やクランプ機構等のメンテナンスが必要となる。しかし、割出装置を工作機械に取り付けたままの状態でこのメンテナンス作業を行うことは極めて困難である。そこで、従来では、上記メンテナンス作業を行う際には割出装置の全体を工作機械から取り外すのが一般的であり、例えば、上述したスピンドルヘッドの場合では、Ｃ軸駆動部全体を工作機械から取り外すことが行われる。   When a certain period of time elapses due to the use of the machine tool, maintenance of the bearings, the clamp mechanism, and the like in the indexing device described above is required. However, it is extremely difficult to perform this maintenance work with the indexing device attached to the machine tool. Therefore, conventionally, when performing the above maintenance work, it is common to remove the entire indexing device from the machine tool. For example, in the case of the spindle head described above, the entire C-axis drive unit is removed from the machine tool. Is done.

しかし、特許文献１によるスピンドルヘッドでは、Ｃ軸駆動部の全体を工作機械から取り外す際、その脱着作業が煩雑であるという問題を有する。具体的には、上述の特許文献１によるスピンドルヘッドにおけるＣ軸駆動部は、その駆動手段としてＤＤモータを採用しており、そのモータステータには複数本のケーブル（電流供給線、アース線、検出器用線等）が接続され、そのケーブルをハウジングの外部に引き出して、工作機械の対応する配線とコネクタ等で接続してある。従って、Ｃ軸駆動部を工作機械から取り外す際には、ケーブルと工作機械側の配線との接続を解除し、また、メンテナンスが終了してＣ軸駆動部を再度工作機械へ取り付ける際には、上記のケーブルと配線との接続を再度行なわなければならない。この配線の接続、解除作業は、配線の数だけ必要なので、非常に煩雑で時間と手間を要することになる。また、駆動モータの数が増えれば、配線の接続、解除作業は一段と煩雑となる。   However, the spindle head according to Patent Document 1 has a problem that the attaching / detaching operation is complicated when the entire C-axis drive unit is removed from the machine tool. Specifically, the C-axis drive unit in the spindle head according to Patent Document 1 employs a DD motor as its drive means, and the motor stator has a plurality of cables (current supply line, ground line, detection line). Dexterous wires, etc.) are connected, the cable is pulled out of the housing, and connected to the corresponding wiring and connector of the machine tool. Therefore, when removing the C-axis drive unit from the machine tool, release the connection between the cable and the wiring on the machine tool side, and when the maintenance is completed and the C-axis drive unit is attached to the machine tool again, The above cable and wiring must be reconnected. Since the wiring connection and release operations are required for the number of wirings, it is very complicated and requires time and labor. Further, if the number of drive motors is increased, wiring connection and release operations become more complicated.

本発明は上記実情を考慮して開発されたもので、その解決課題は、上述の割出装置に対するメンテナンス作業に付随する作業を容易化するための割出装置の構造を提供することである。   The present invention has been developed in view of the above circumstances, and a problem to be solved is to provide a structure of the indexing device for facilitating the work accompanying the maintenance work for the indexing device.

本発明は、スピンドルユニットを角度調整可能な状態で回転可能に支持する第一の支持ヘッドが一端に固定される回転軸と、該回転軸を支持するために前記回転軸の外周を少なくとも囲むと共に工作機械本体に着脱可能なハウジングと、該ハウジングと前記回転軸との間に設けられる軸受と、前記ハウジングと前記回転軸との間に設けられると共に前記回転軸を回転させるために前記回転軸の周りに同心円状に配置されたモータロータ及びモータステータからなる駆動モータを備える駆動手段であって前記モータステータが前記ハウジングに固定されると共に前記モータロータが前記回転軸に固定された駆動手段と、前記駆動手段によって回転されて角度位置が割り出された前記回転軸を回転不能に保持するクランプ機構とを含む工作機械用の割出装置を前提とする。
The present invention includes a rotating shaft first support head is fixed to one end rotatably supporting the spindle unit at an angle adjustable state, surrounds at least the periphery of said rotary shaft for supporting the rotary shaft and removable housing machine tool body, a bearing provided between the between the housing rotation axis, of the rotating shaft to rotate the rotary shaft with provided between said housing rotation axis Drive means comprising a drive motor comprising a motor rotor and a motor stator arranged concentrically around the drive means , wherein the motor stator is fixed to the housing and the motor rotor is fixed to the rotating shaft, and the drive for machine tools comprising a clamping mechanism for non-rotatably holding said rotary shaft is rotated by angular position is indexed by means The indexing device is assumed.

そして、請求項１の発明は、前記ハウジングは、前記軸受を前記回転軸との間に介在させる前記第一の支持ヘッド側の固定部材と、前記回転軸の軸線方向に関し該固定部材に対し前記第一の支持ヘッドとは反対側に位置すると共に前記モータステータが固定されるケーシング部材とから成り、前記ケーシング部材を前記固定部材に着脱可能に連結して構成されており、前記駆動手段は、前記回転軸の軸線方向に沿って複数の前記駆動モータを直列的に配置して構成されており、前記回転軸、前記軸受、前記各駆動モータの前記モータロータ及び前記固定部材を組み付けて内蔵ユニットを構成すると共に、前記ケーシング部材と少なくとも前記第一の支持ヘッドとは反対側に配置された前記駆動モータの前記モータステータとを組み付け且つ前記モータステータに接続するケーブルを前記固定部材に対して前記第一の支持ヘッドとは反対側から引き出すことによって外装ユニットを構成し、前記内蔵ユニットは、前記外装ユニットに対し、前記第一の支持ヘッドを前記回転軸に固定したまま前記第一の支持ヘッド側から抜き差し可能に連結されている、ことを特徴とする。
The invention of claim 1, wherein the housing includes a fixed member of the first support head side to be interposed between the pre-SL bearing the rotary shaft with respect to the fixed member relates the axial direction of the rotary shaft consists of a casing member in which the motor stator is fixed with the said first support head positioned on the opposite side and the casing member is configured by connecting detachably to the fixed member, the drive means A plurality of drive motors arranged in series along the axial direction of the rotary shaft, and the rotary shaft, the bearing, the motor rotor of each drive motor, and the fixing member are assembled into a built-in unit. together constituting the casing member and at least the said drive motor disposed on the opposite side of the first supporting head and the motor stator and the assembly and pre Configure the exterior unit by drawing from the opposite side to the first support head cable connected to the motor stator with respect to the fixed member, the internal unit, with respect to the armored unit, the first support head It is connected to the first support head side so that it can be inserted and removed while being fixed to the rotating shaft .

本発明は、工作機械に用いられるスピンドルヘッドの割出装置において、回転軸の軸線方向に沿ってハウジングをケーシング部材と固定部材とに分け、モータステータに接続するケーブルを含む外装ユニットに対して内蔵ユニットを第一の支持ヘッド側から抜き差し可能に設けてあるので、モータステータを含む外装ユニットを工作機械本体側へ残したまま、内蔵ユニットを引き抜くことで取り外すことができる。その結果、クランプ機構を含む割出装置において、ケーブルの接続を解除する作業を行なうことなく内蔵ユニットや外装ユニットに含まれる軸受、クランプ機構等の各部材のメンテナンスが可能となる。これにより、上記割出装置のメンテナンス作業の容易化及び時間短縮を図ることができる。
The present invention relates to an indexing device for a spindle head used in a machine tool, in which a housing is divided into a casing member and a fixing member along an axial direction of a rotating shaft, and is incorporated in an exterior unit including a cable connected to a motor stator. Since the unit is provided so as to be removable from the first support head side, it can be removed by pulling out the built-in unit while leaving the exterior unit including the motor stator on the machine tool main body side. As a result, in the indexing device including the clamp mechanism, maintenance of each member such as the bearing and the clamp mechanism included in the built-in unit and the exterior unit can be performed without performing the work of releasing the cable connection. Thereby, the maintenance work of the indexing device can be facilitated and the time can be shortened.

また、上記割出装置において、複数の駆動モータを回転軸の軸線方向に沿って直列的に設けた駆動手段を用い、第一の支持ヘッドとは反対側における駆動モータのモータステータを固定するケーシング部材を用いるので、複数の駆動モータのうち少なくとも第一の支持ヘッドとは反対側の駆動モータのモータステータについてはケーブルの接続を解除しなくとも、内蔵ユニットを抜き差しできるので、その分だけメンテナンス作業の容易化及び時間短縮を図ることができる。
 In the indexing device, a casing for fixing a motor stator of the drive motor on the side opposite to the first support head , using drive means in which a plurality of drive motors are provided in series along the axial direction of the rotation shaft Since a member is used, the built-in unit can be inserted and removed without disconnecting the cable for the motor stator of the drive motor on the side opposite to the first support head among the plurality of drive motors. Simplification and time reduction.

本発明が適用される工作機械１の一例として、図９に示すように、門型工作機械（マシニングセンタ）を五軸加工機や多面加工機などの複合化加工機として用いるものを挙げる。図示の工作機械１は、同時五軸制御可能な加工機であって、ベッド２の両側から起立する左右のコラム３，３と、両コラム３，３の間に跨って両コラム３の前後面の片面上を上下方向（Ｚ軸方向）に移動するクロスレール４と、クロスレール４の前面上（コラム３に対してクロスレール４を設けた面と同一面上）を水平に左右方向（Ｙ軸方向）に移動するサドル５と、サドル５の前面上をＺ軸方向に移動するラム６と、ベッド２の上面を前後方向に移動するテーブル７とを工作機械本体として備えるものである。さらに、工作機械本体のラム６には加工用ヘッド８（前述のスピンドルヘッドに相当）を着脱可能に取り付け、工具が取り付けられるスピンドル９を備えたスピンドルユニット10を、加工用ヘッド８の一部品として備えている。   As an example of the machine tool 1 to which the present invention is applied, as shown in FIG. 9, a portal machine tool (machining center) is used as a complex machine such as a five-axis machine or a multi-face machine. The illustrated machine tool 1 is a processing machine capable of simultaneous five-axis control, and the left and right columns 3 and 3 standing from both sides of the bed 2 and the front and rear surfaces of both columns 3 straddling between the columns 3 and 3. The cross rail 4 that moves in the vertical direction (Z-axis direction) on one side of the cross rail 4 and the front side of the cross rail 4 (on the same surface as the column 3 on which the cross rail 4 is provided) horizontally in the horizontal direction (Y The machine tool body includes a saddle 5 that moves in the axial direction), a ram 6 that moves in the Z-axis direction on the front surface of the saddle 5, and a table 7 that moves in the front-rear direction on the upper surface of the bed 2. Further, a machining head 8 (corresponding to the aforementioned spindle head) is detachably attached to the ram 6 of the machine tool body, and a spindle unit 10 having a spindle 9 to which a tool is attached is used as a part of the machining head 8. I have.

かかる工作機械１は、ワークの加工時において、予め設定されたプログラムに基づく数値制御により、テーブル７、クロスレール４、サドル５及びラム６を移動させると共に、加工用ヘッド８がスピンドルユニット10の角度位置（回転位置）の割出しを行なう。これにより、門型工作機械では、ワークの各加工面に対して工具を最適な角度で当てて加工を行なうことができ、複雑な形状のワークの切削加工等を可能としている。   The machine tool 1 moves the table 7, the cross rail 4, the saddle 5, and the ram 6 by numerical control based on a preset program at the time of machining a workpiece, and the machining head 8 has an angle of the spindle unit 10. Index the position (rotation position). Thereby, in the portal machine tool, it is possible to perform machining by applying a tool to each machining surface of the workpiece at an optimum angle, and it is possible to cut a workpiece having a complicated shape.

加工用ヘッド８は、図７に示すように、工具が取り付けられるスピンドル９を有するスピンドルユニット10と、スピンドルユニット10を角度調節を可能な状態で回転可能に支持する第一の支持ヘッド11と、スピンドルユニット10とは反対側で第一の支持ヘッド11を回転可能に支持する第二の支持ヘッド（前述のＣ軸駆動部に相当）20を含むものである。そして、第一の支持ヘッド11（第一の支持ヘッド11の基部12）が本願発明の回転駆動対象部材に相当し、第二の支持ヘッド20が割出装置に相当する。   As shown in FIG. 7, the machining head 8 includes a spindle unit 10 having a spindle 9 to which a tool is attached, a first support head 11 that rotatably supports the spindle unit 10 in a state where angle adjustment is possible, A second support head (corresponding to the above-mentioned C-axis drive unit) 20 that rotatably supports the first support head 11 on the side opposite to the spindle unit 10 is included. The first support head 11 (the base 12 of the first support head 11) corresponds to the rotational drive target member of the present invention, and the second support head 20 corresponds to the indexing device.

スピンドルユニット10は、モータ内蔵型のスピンドルヘッドであって、そのケース13内に回転可能に支持されたスピンドル９を、内蔵された図示しないモータで高速回転駆動するものである。   The spindle unit 10 is a spindle head with a built-in motor. The spindle unit 10 is rotatably supported in a case 13 by a built-in motor (not shown).

第一の支持ヘッド11は、スピンドルユニット10を、その鉛直方向の軸線方向（以下「Ｃ軸方向」という）と直交する軸線（以下、「Ａ軸」という）を中心にして回転可能に支持すると共に、内蔵するモータでスピンドルユニット10をＡ軸を中心に回転させてその角度位置を割出すものである。Ｃ軸は、工作機械１のＺ軸と平行である。   The first support head 11 supports the spindle unit 10 so as to be rotatable about an axis (hereinafter referred to as “A-axis”) perpendicular to the vertical axis direction (hereinafter referred to as “C-axis direction”). At the same time, the spindle unit 10 is rotated about the A axis by a built-in motor, and its angular position is determined. The C axis is parallel to the Z axis of the machine tool 1.

第一の支持ヘッド11は、基部12（第二の支持ヘッド20側の部分）に対し一対の脚部14，14が離間して（間隔をあけて）取り付けられたフォーク形に構成されており、一対の脚部14,14の間でスピンドルユニット10を支持する。詳しくは、スピンドルユニット10の両側面には、各脚部14の内部で回転可能に支持されると共に回転軸線をＡ軸に一致させて配置された一対の支持軸（図示せず）が取付けられ、この支持軸によって一対の脚部14,14間で回転可能に支持される。そして、支持軸が脚部14に内蔵されたモータによって回転駆動されることにより、スピンドルユニット10がＡ軸を中心に回転されてその角度位置が割り出される。   The first support head 11 is configured in a fork shape in which a pair of leg portions 14 and 14 are attached to the base portion 12 (the portion on the second support head 20 side) at a distance (interval). The spindle unit 10 is supported between the pair of leg portions 14 and 14. Specifically, a pair of support shafts (not shown) are attached to both side surfaces of the spindle unit 10 so as to be rotatably supported in the respective leg portions 14 and arranged so that the rotation axis coincides with the A axis. The support shaft is rotatably supported between the pair of leg portions 14 and 14. Then, when the support shaft is rotated by a motor built in the leg portion 14, the spindle unit 10 is rotated around the A axis, and the angular position thereof is determined.

第二の支持ヘッド20は、第一の支持ヘッド11をＣ軸を中心に回転可能に支持し、内蔵する駆動手段で第一の支持ヘッド11を回転させてその角度位置を割出すことにより、延てはスピンドルユニット10の角度位置を割出すものである。第二の支持ヘッド20は、工作機械１のラム６に取り付けられ、その一端側に第一の支持ヘッド11が取り付けてある。なお、以後の説明において、第二の支持ヘッド20を構成する各パーツは、基本的にＣ軸を軸線とする筒状やリング状に形成されているものとする。また、連結とは、ネジ、ボルト等のネジ部材によって締結固定することをいうものとする。   The second support head 20 supports the first support head 11 so as to be rotatable about the C axis, and rotates the first support head 11 with a built-in driving means to determine its angular position. As a result, the angular position of the spindle unit 10 is determined. The second support head 20 is attached to the ram 6 of the machine tool 1, and the first support head 11 is attached to one end side thereof. In the following description, each part constituting the second support head 20 is basically formed in a cylindrical shape or a ring shape having the C axis as an axis. In addition, the term “connection” refers to fastening with a screw member such as a screw or a bolt.

第二の支持ヘッド20は、図１又は図２に示すように、外装ユニット21に対して、その内部に収容する内蔵ユニット22をＣ軸方向に沿って回転駆動対象部材側から抜き差し可能に連結すると共に、外装ユニット21に対して内蔵ユニット22をＣ軸を中心にして回転可能に支持するものである。なお、図示の例では、外装ユニット21に対し内蔵ユニット22を抜き差し可能とするために、外装ユニット21の内周面の各部における直径寸法を、それよりも反回転駆動対象部材側の内蔵ユニット22の直径寸法（外径寸法）よりも大きくしてある。   As shown in FIG. 1 or FIG. 2, the second support head 20 is connected to the exterior unit 21 so that the built-in unit 22 accommodated in the exterior unit 21 can be inserted and removed from the rotational drive target member side along the C-axis direction. In addition, the built-in unit 22 is supported so as to be rotatable about the C axis with respect to the exterior unit 21. In the illustrated example, in order to enable the built-in unit 22 to be inserted into and removed from the exterior unit 21, the diameter dimension of each part of the inner peripheral surface of the exterior unit 21 is set to the built-in unit 22 on the counter-rotation drive target member side. The diameter dimension (outer diameter dimension) is larger.

第二の支持ヘッド20は、ハウジング30と、ハウジング30の内部で回転可能に支持される回転軸40と、ハウジング30と回転軸40との間に介装される軸受B1と、同じくハウジング30と回転軸40との間に介装される駆動手段Ｍと、同じくハウジング30と回転軸40との間に介在するクランプ機構50（回転軸40を回転不能に保持するもの）とから構成される。   The second support head 20 includes a housing 30, a rotary shaft 40 rotatably supported within the housing 30, a bearing B1 interposed between the housing 30 and the rotary shaft 40, and the housing 30. The driving means M is interposed between the rotary shaft 40 and a clamp mechanism 50 (which holds the rotary shaft 40 in a non-rotatable manner) interposed between the housing 30 and the rotary shaft 40.

駆動手段Ｍは、工作機械１に固定されるハウジング30に対して回転軸40を回転駆動するものであって、図示の例では、Ｃ軸方向に間隔をあけて直列的に配置した２個の駆動モータM1、M2が採用されている。各駆動モータM1、M2は、ギヤ等の減速器を使わずに直接負荷に繋いで運転するタイプのもの（俗に、直接駆動型モータ／ＤＤモータと言われる。）である。そして、各駆動モータM1、M2は、固定鉄心にコイルを捲回して構成されたモータステータM1b、M2bと、モータステータM1b、M2bの内周面に近設して対向する複数のマグネットを周方向に亘って配置したモータロータM1a、M2ａと、モータステータM1b、M2bを保持するステータスリーブM1c、M2cとを同心円状に配置した構成（俗に、インナーロータ形ＤＤモータと言われる）となっている。   The drive means M rotates the rotary shaft 40 with respect to the housing 30 fixed to the machine tool 1, and in the illustrated example, the drive means M includes two pieces arranged in series at intervals in the C-axis direction. Drive motors M1 and M2 are employed. Each of the drive motors M1 and M2 is of a type that is connected to a load without using a speed reducer such as a gear (commonly referred to as a direct drive motor / DD motor). Each drive motor M1 and M2 is composed of a motor stator M1b and M2b configured by winding a coil around a fixed iron core, and a plurality of magnets facing and close to the inner peripheral surface of the motor stator M1b and M2b in the circumferential direction. The motor rotors M1a and M2a arranged over the stator and the stator sleeves M1c and M2c holding the motor stators M1b and M2b are arranged concentrically (commonly referred to as an inner rotor type DD motor).

ハウジング30は、回転軸40を支持するためのものであって、駆動モータM1,M2のモータステータM1b,M2bが固定される反回転駆動対象部材側のケーシング部材30aと、軸受B1を回転軸40との間に介在させる回転駆動対象部材側の固定部材30bとから構成され、ケーシング部材30aに固定部材30bを着脱可能に連結したものである。   The housing 30 is for supporting the rotary shaft 40, and the casing member 30a on the counter-rotation drive target member side to which the motor stators M1b, M2b of the drive motors M1, M2 are fixed, and the bearing B1 are connected to the rotary shaft 40. And a fixing member 30b on the rotation drive target member side interposed between the fixing member 30b and the casing member 30a.

図示の例では、ケーシング部材30aは、各モータステータM1b,M2bの外周を少なくとも囲むものであって、縦長の筒型に連結された２個のハウジング部材31,32であってＣ軸方向に分割可能に連結されたハウジング部材31,32と、連結したハウジング部材31,32の反回転駆動対象部材側に連結して開口を塞ぐ蓋状の部材（蓋部材）33とを主として構成される。以下では、このハウジング部材31,32について、図面上側のハウジング部材31を第一のハウジング部材、下側のハウジング部材32を第二のハウジング部材とする。そして、ケーシング部材30aは、第一ハウジング部材31、第二ハウジング部材32及び蓋部材33を連結することにより、回転駆動対象部材側に向かって開口する空間を内側に形成し、この空間内の外側の部分にモータステータM1b,M2b及びクランプ機構50を収容し、内側の部分に内蔵ユニット22の大半を収容する。   In the illustrated example, the casing member 30a surrounds at least the outer periphery of each of the motor stators M1b, M2b, and is two housing members 31, 32 connected in a vertically long cylindrical shape and divided in the C-axis direction. The housing members 31 and 32 that are connected to each other and a lid-like member (lid member) 33 that is connected to the counter-rotation drive target member side of the connected housing members 31 and 32 and closes the opening are mainly configured. Hereinafter, for the housing members 31 and 32, the upper housing member 31 in the drawing is the first housing member, and the lower housing member 32 is the second housing member. The casing member 30a connects the first housing member 31, the second housing member 32, and the lid member 33, thereby forming a space that opens toward the rotation drive target member side on the inside, and the outside in this space. The motor stators M1b and M2b and the clamp mechanism 50 are accommodated in this part, and most of the built-in unit 22 is accommodated in the inner part.

第一ハウジング部材31は、その本体31aをその下端部が内向きに屈曲する片側断面Ｌ字状に形成し、その本体31aの上端部に、半径方向内側に突出する第一ハウジングスリーブ31bを連結し、全体としての片側断面を内向きに開口するコ字状に形成してある。   The first housing member 31 has a main body 31a formed in a L-shaped one-side cross section with its lower end bent inward, and a first housing sleeve 31b protruding radially inward is connected to the upper end of the main body 31a. In addition, the one-side cross section as a whole is formed in a U shape opening inward.

第二ハウジング部材32は、その本体32aの上端部に半径方向内向きに突出する第二ハウジングスリーブ32bを連結して構成してある。そして、第二ハウジング部材32は、第二ハウジングスリーブ32bを第一ハウジング部材31の下部に連結することにより第一ハウジング部材31に対し固定される。   The second housing member 32 is configured by connecting a second housing sleeve 32b projecting radially inward to the upper end portion of the main body 32a. The second housing member 32 is fixed to the first housing member 31 by connecting the second housing sleeve 32b to the lower portion of the first housing member 31.

固定部材30bは、軸受B1の外周を囲みつつ第二ハウジング部材32の本体32aの下端（ケーシング部材30a）に着脱可能に連結される係止スリーブであって、複数の部品を連結して片側断面が内向きに開くコ字状に形成され、その内側に軸受B1の外周部（外輪）を収容する空間を形成している。固定部材30bの上端面とケーシング部材30aの下端面とは、凹凸の嵌め合いによる位置決めをし、円周方向の複数個所において外周側から半径方向内側に向かって螺挿されるネジ部材によって連結されている。   The fixing member 30b is a locking sleeve that is detachably connected to the lower end (casing member 30a) of the main body 32a of the second housing member 32 while surrounding the outer periphery of the bearing B1, and includes a plurality of components connected to each other. Is formed in a U-shape that opens inward, and a space for accommodating the outer peripheral portion (outer ring) of the bearing B1 is formed inside thereof. The upper end surface of the fixing member 30b and the lower end surface of the casing member 30a are positioned by fitting the concaves and convexes, and are connected by screw members that are screwed from the outer peripheral side toward the radial inner side at a plurality of locations in the circumferential direction. Yes.

回転軸40は、その軸心を中心とする貫通孔が形成された複数の軸部材41、42を主として構成され、第一ハウジング部材31と第二ハウジング部材32の分割箇所に対応する箇所でＣ軸方向に分割可能に設けてある。以下では、第一ハウジング部材31の内周側の空間に配置する軸部材41を第一軸部材、第二ハウジング部材32の内周側の空間に配置する軸部材42を第二軸部材とする。   The rotary shaft 40 is mainly composed of a plurality of shaft members 41 and 42 each having a through-hole centered on the shaft center thereof, and is formed at a portion corresponding to the divided portion of the first housing member 31 and the second housing member 32. It can be divided in the axial direction. Hereinafter, the shaft member 41 disposed in the space on the inner peripheral side of the first housing member 31 is referred to as a first shaft member, and the shaft member 42 disposed in the space on the inner peripheral side of the second housing member 32 is referred to as a second shaft member. .

第一軸部材41は、その本体41aの下部を、第一ハウジング部材31の下部に対向して半径方向外向きに突出すると共に、本体41aの上部外側に、半径方向外向きに突出する第一外スリーブ41bを連結し、本体41aの上部内側に、半径方向内向きに突出する第一内スリーブ41cの外周部を連結して構成してある。そして、第一軸部材41と第一ハウジング部材31との間の筒形の空間に駆動モータM1を配置し、第一内スリーブ41cの内周部と本体41aの下部を第二軸部材42に連結してある。   The first shaft member 41 has a lower portion of the main body 41a projecting radially outwardly facing the lower portion of the first housing member 31, and a first projecting radially outwardly outward of the upper portion of the main body 41a. The outer sleeve 41b is connected, and the outer peripheral portion of the first inner sleeve 41c protruding inward in the radial direction is connected to the upper inner side of the main body 41a. The drive motor M1 is disposed in a cylindrical space between the first shaft member 41 and the first housing member 31, and the inner peripheral portion of the first inner sleeve 41c and the lower portion of the main body 41a are connected to the second shaft member 42. It is connected.

上側の駆動モータM1は、第一ハウジング部材31の内周側にステータスリーブM1cを介してモータステータM1bを固定し、第一軸部材41の外周側にモータロータM1aを固定したものである。より詳しく言えば、モータステータM1bをステータスリーブM1cの内周面に同心円状に嵌め込んで固定し、ステータスリーブM1cを第一ハウジングスリーブ31bの下側に連結して第一ハウジング部材31に対しモータステータM1bを固定している。また、第一軸部材41の外周面にモータロータM1aを嵌め込み、第一外スリーブ41bの下面にモータロータM1aを連結して第一軸部材41に対しモータロータM1aを固定している。   The upper drive motor M1 has a motor stator M1b fixed to the inner peripheral side of the first housing member 31 via a stator sleeve M1c, and a motor rotor M1a fixed to the outer peripheral side of the first shaft member 41. More specifically, the motor stator M1b is concentrically fitted and fixed to the inner peripheral surface of the stator sleeve M1c, and the stator sleeve M1c is connected to the lower side of the first housing sleeve 31b to connect the motor to the first housing member 31. The stator M1b is fixed. Further, the motor rotor M1a is fitted on the outer peripheral surface of the first shaft member 41, the motor rotor M1a is connected to the lower surface of the first outer sleeve 41b, and the motor rotor M1a is fixed to the first shaft member 41.

また、上側の駆動モータM1には、コネクタc1を介してケーブルc11を接続してある。ケーブルc11は、例えば、モータステータM1bに内蔵されるコイルに電流を供給するためのＵ、Ｖ、Ｗ相用の電流供給ケーブル、アース線、駆動モータM1の異常を検出するための検出線等である。コネクタc1を配置するために、第一ハウジングスリーブ31bの下面の一部に局部的に窪んだ空間を形成し、その窪んだ空間にコネクタc1を配置している。また、ケーブルc11を通すために、第一ハウジングスリーブ31b及び蓋部材33には上下に貫通するケーブル用配線孔H1を連通して設けてある。   A cable c11 is connected to the upper drive motor M1 via a connector c1. The cable c11 is, for example, a U, V, W phase current supply cable for supplying a current to a coil built in the motor stator M1b, a ground wire, a detection line for detecting an abnormality of the drive motor M1, etc. is there. In order to arrange the connector c1, a locally recessed space is formed in a part of the lower surface of the first housing sleeve 31b, and the connector c1 is disposed in the recessed space. In order to pass the cable c11, the first housing sleeve 31b and the lid member 33 are provided with a cable wiring hole H1 penetrating vertically.

第二軸部材42は、段差付きの形状であって、第一軸部材41の内周に嵌まり込む小径部分と、第一軸部材41の下端面に突き合わさる大径部分とをＣ軸方向に連結した構成である。言い換えれば、Ｃ軸方向に延在する本体42aと、本体42aの上部外側に連結されて半径方向外向きに突出する第二外スリーブ42bと、本体42aの上部内側（中央）に連結されて第一軸部材41の内周に向かって突出する第二内スリーブ42cとを主として構成する。本体42aの上端面の中央部に凹部42d形成し、第一軸部材41の本体41aの下部、及び第二内スリーブ42cの下部を凹部42dに配置する。また、第二軸部材42は、第二内スリーブ42cをその上の第一内スリーブ41cの内周部に連結し、第二外スリーブ42bをその上の第一軸部材41の本体41aに連結してある。   The second shaft member 42 has a stepped shape, and includes a small-diameter portion that fits in the inner periphery of the first shaft member 41 and a large-diameter portion that abuts the lower end surface of the first shaft member 41 in the C-axis direction. It is the structure connected to. In other words, the main body 42a extending in the C-axis direction, the second outer sleeve 42b connected to the upper outer side of the main body 42a and projecting outward in the radial direction, and the upper inner side (center) of the main body 42a are connected to the first. A second inner sleeve 42c projecting toward the inner periphery of the uniaxial member 41 is mainly configured. A concave portion 42d is formed at the center of the upper end surface of the main body 42a, and the lower portion of the main body 41a of the first shaft member 41 and the lower portion of the second inner sleeve 42c are disposed in the concave portion 42d. Further, the second shaft member 42 connects the second inner sleeve 42c to the inner peripheral portion of the first inner sleeve 41c thereon, and connects the second outer sleeve 42b to the main body 41a of the first shaft member 41 thereon. It is.

また、第二軸部材42は、その本体42aの下側に配置されたフランジ部材42e、及びフランジ部材42eを挟むようにして配置された連結部材42fを有し、フランジ部材42eと共に連結部材42fを第二軸部材42の下面に連結して構成してある。なお、連結部材42fの下端面と第一の支持ヘッド11の基部12の上端面とは、凹凸の嵌め合いによる位置決めをしてある。   Further, the second shaft member 42 has a flange member 42e disposed on the lower side of the main body 42a, and a connecting member 42f disposed so as to sandwich the flange member 42e. The shaft member is connected to the lower surface of the shaft member. Note that the lower end surface of the connecting member 42f and the upper end surface of the base portion 12 of the first support head 11 are positioned by fitting irregularities.

第二軸部材42と第二ハウジング部材32は、その適宜箇所を内向き又は外向きに突出することによって、両部材42,32の間に環状の二つの空間を上下に間隔をあけて形成し、その二つの空間に、駆動モータM2、クランプ機構50を分けて配置してある。また、第二軸部材42と固定部材30bは、その間に形成する空間に軸受B1を配置してある。   The second shaft member 42 and the second housing member 32 are formed with two annular spaces spaced vertically between the members 42 and 32 by projecting appropriate portions thereof inward or outward. The drive motor M2 and the clamp mechanism 50 are separately arranged in the two spaces. Further, the second shaft member 42 and the fixing member 30b have a bearing B1 disposed in a space formed therebetween.

下側の駆動モータM2は、二つの空間のうちの上側の空間に配置され、上側の駆動モータM1と同様にモータロータM2a、モータステータM2b、ステータスリーブM2cとから構成され、各々を同様に、第二ハウジングスリーブ32bを介して第二ハウジング部材32に固定し、第二外スリーブ42bを介して第二軸部材42に固定してある。   The lower drive motor M2 is arranged in the upper space of the two spaces, and is composed of a motor rotor M2a, a motor stator M2b, and a stator sleeve M2c in the same manner as the upper drive motor M1, It is fixed to the second housing member 32 via the two housing sleeves 32b and fixed to the second shaft member 42 via the second outer sleeve 42b.

また、下側の駆動モータM2にもコネクタc2を介して複数のケーブルc21を接続してある。コネクタc2を配置するために、第二ハウジングスリーブ32bの下面に局部的に窪んだ空間を形成してある。また、ケーブルc21を通すためにケーブル用配線孔H2を、第二ハウジングスリーブ32b、第一ハウジング部材31、第一ハウジングスリーブ31b、蓋部材33の各内部に軸線方向に沿って連通して形成してある。さらに、第一ハウジング部材31は、その下端部の外周に、ケーブルc21に通じる外向窓31cを設けている。外向窓31cは、第一ハウジング部材31と第二ハウジングスリーブ32bとを連結後にケーブルc21をケーブル用配線孔H2に通す際に使用される。   A plurality of cables c21 are also connected to the lower drive motor M2 via a connector c2. In order to arrange the connector c2, a locally recessed space is formed on the lower surface of the second housing sleeve 32b. In addition, a cable wiring hole H2 is formed in the second housing sleeve 32b, the first housing member 31, the first housing sleeve 31b, and the lid member 33 so as to communicate along the axial direction in order to pass the cable c21. It is. Further, the first housing member 31 is provided with an outward window 31c communicating with the cable c21 on the outer periphery of the lower end portion thereof. The outward window 31c is used when the cable c21 is passed through the cable wiring hole H2 after connecting the first housing member 31 and the second housing sleeve 32b.

クランプ機構50は、二つの空間のうちの下側の空間に配置され、回転軸40を相対的に締め付けて回転軸40を相対回転不能とするクランプスリーブ51と、クランプスリーブ51を変形させる作動流体を導く受圧部材52とから構成され、第二ハウジング部材32の内周側に受圧部材52、クランプスリーブ51を順次同心円状に配置して連結してある。クランプスリーブ51は、その外周に溝を有し、その溝により上下の厚肉部51a,51aの間に変形可能な薄肉部51bが形成される。また、その溝と受圧部材52とにより、薄肉部51bの外側と受圧部材52との間に圧力室53を形成してある。そして、クランプスリーブ51は、薄肉部51bを第二軸部材42に近接させて配置される。更に、受圧部材52には、その内部に圧力室53に通じる流体通路54が形成してあり、その流体通路54の出口部54aが圧力室53に開口している。流体通路54は、ハウジング部材31,32及び蓋部材33に形成した流体流路であって、接合部材33から外部の流体流路（図示せず）に通じている。そして、流体通路54に流体を供給することにより、薄肉部51bを小径方向に変形させて第二軸部材42を締め付けて回転軸40を回転不能な状態に保持する。   The clamp mechanism 50 is disposed in a lower space of the two spaces, and includes a clamp sleeve 51 that relatively tightens the rotation shaft 40 to make the rotation shaft 40 relatively unrotatable, and a working fluid that deforms the clamp sleeve 51 The pressure receiving member 52 and the clamp sleeve 51 are sequentially arranged concentrically and connected to the inner peripheral side of the second housing member 32. The clamp sleeve 51 has a groove on its outer periphery, and a deformable thin portion 51b is formed between the upper and lower thick portions 51a, 51a. Further, a pressure chamber 53 is formed between the outer side of the thin portion 51 b and the pressure receiving member 52 by the groove and the pressure receiving member 52. The clamp sleeve 51 is disposed with the thin portion 51b close to the second shaft member. Further, the pressure receiving member 52 is formed therein with a fluid passage 54 communicating with the pressure chamber 53, and an outlet 54 a of the fluid passage 54 opens into the pressure chamber 53. The fluid passage 54 is a fluid passage formed in the housing members 31 and 32 and the lid member 33 and communicates from the joining member 33 to an external fluid passage (not shown). Then, by supplying fluid to the fluid passage 54, the thin portion 51b is deformed in the small diameter direction, the second shaft member 42 is tightened, and the rotating shaft 40 is held in a non-rotatable state.

軸受B1は、アキシアル方向及びラジアル方向の荷重を支持可能な複列形式のころ軸受を採用してある。具体的には三列ローラベアリング（三列円筒ころ軸受／アキシアル・ラジアルローラベアリングとも言う）を採用してある。詳しく言えば、図８に示すように、軸受B1（三列ローラベアリング）は、内輪B1aと、外輪B1bと、内輪B1aと外輪B1bの間に介在する複数の円筒ころB1cによって構成される。内輪B1aを複数のパーツの組み付けによって片側断面コ字状に外向きに開口して形成し、その開口する溝部の高さ中間部に外輪B1bの内周部を配置し、内輪B1aを回転軸40に、外輪B1bを固定部材30bにそれぞれ連結し、外輪B1bの上、下、内側に円筒ころB1cをそれぞれ配置し、上下の円筒ころB1c、B1cでアキシアル方向の荷重を支持し、内側の円筒ころB1cでラジアル方向の荷重を支持してある。内側の円筒ころB1cは、図示しない保持部材によって保持される。   The bearing B1 employs a double-row roller bearing capable of supporting axial and radial loads. Specifically, a three-row roller bearing (also called a three-row cylindrical roller bearing / axial / radial roller bearing) is employed. Specifically, as shown in FIG. 8, the bearing B1 (three-row roller bearing) includes an inner ring B1a, an outer ring B1b, and a plurality of cylindrical rollers B1c interposed between the inner ring B1a and the outer ring B1b. Inner ring B1a is formed by assembling a plurality of parts to open outward in a U-shaped cross section on one side, and the inner peripheral part of outer ring B1b is arranged in the middle of the height of the groove to open, and inner ring B1a is connected to rotating shaft 40. The outer ring B1b is connected to the fixing member 30b, and the cylindrical rollers B1c are respectively arranged above, below, and inside the outer ring B1b. The upper and lower cylindrical rollers B1c, B1c support the axial load, and the inner cylindrical rollers B1c supports the radial load. The inner cylindrical roller B1c is held by a holding member (not shown).

なお、回転軸40の回転量、即ち第一の支持ヘッド11の角度位置を検出するための回転検出器は、図示しないが、ハウジング30と回転軸40の双方に亘って固定してある。回転検出器の検出信号は、工作機械１の制御装置に送られ、第一の支持ヘッド11の回転制御に用いられる。   A rotation detector for detecting the amount of rotation of the rotating shaft 40, that is, the angular position of the first support head 11, is fixed over both the housing 30 and the rotating shaft 40, although not shown. The detection signal of the rotation detector is sent to the control device of the machine tool 1 and used for rotation control of the first support head 11.

以上の第二の支持ヘッド20において、本発明で言う外装ユニット21は、ハウジング30のうちの反回転駆動対象部材側（回転駆動対象部材の反対側）に位置するケーシング部材30aと、駆動手段Ｍを構成する２個の駆動モータM1,M2の各モータステータM1b,M2bと、クランプ機構50とを連結して一体化したものに相当し、各モータステータM1b,M2bに接続されたケーブルc11,c21が反回転駆動対象部材側から引き出されるように構成されている。   In the second support head 20 described above, the exterior unit 21 referred to in the present invention includes a casing member 30a located on the side opposite to the rotational drive target member of the housing 30 (opposite side of the rotational drive target member), and drive means M. The motor stators M1b and M2b of the two drive motors M1 and M2 constituting the motor and the clamp mechanism 50 are connected and integrated, and the cables c11 and c21 connected to the motor stators M1b and M2b Is pulled out from the counter-rotation drive target member side.

一方、内蔵ユニット22は、残りの部分、即ち、ハウジング30のうちの回転駆動対象部材側に位置する固定部材30bと、回転軸40と、各駆動モータM1,M2のモータロータM1a,M2aと、軸受B1とを連結して一体化したものに相当する。   On the other hand, the built-in unit 22 includes the remaining portion, that is, the fixed member 30b located on the rotation drive target member side of the housing 30, the rotation shaft 40, the motor rotors M1a and M2a of the drive motors M1 and M2, and the bearings. Equivalent to connecting and integrating B1.

そして、以上の構成による第二の支持ヘッド20によれば、前述のように外装ユニット21に対し内蔵ユニット22が抜き差し可能となっている。言い換えれば、内蔵ユニット22が挿入される外装ユニット21の内部空間の各部の直径寸法（例えば、駆動モータM1,M2が存在する部分においてはモータステータM1b,M2bの内周面の直径寸法）を、それよりも反回転駆動対象部材側に位置する内蔵ユニット22の各部の外形寸法よりも大きくしてあるため、内蔵ユニット22のみを工作機械１から取り外すことが可能となり、モータステータM1b,M2bが固定されているケーシング部材30aを工作機械１から取り外すことなく、軸受B1やクランプ機構50等の第二の支持ヘッド20内の各部材のメンテナンスを可能な状態とすることができる。   According to the second support head 20 having the above configuration, the built-in unit 22 can be inserted into and removed from the exterior unit 21 as described above. In other words, the diameter dimension of each part of the internal space of the exterior unit 21 into which the built-in unit 22 is inserted (for example, the diameter dimension of the inner peripheral surfaces of the motor stators M1b and M2b in the part where the drive motors M1 and M2 exist) Since it is larger than the external dimensions of each part of the built-in unit 22 located on the counter-rotation drive target member side, only the built-in unit 22 can be removed from the machine tool 1, and the motor stators M1b and M2b are fixed. Without removing the casing member 30a from the machine tool 1, maintenance of each member in the second support head 20 such as the bearing B1 and the clamp mechanism 50 can be performed.

より詳しくは、メンテナンス作業の際にモータステータM1b,M2bを工作機械１から取り外す必要が無いため、前述のモータステータM1b,M2bに接続されたケーブルと工作機械側の配線との接続解除及び再接続作業が不要となる。その結果、メンテナンス作業の容易化及び時間短縮を図ることができる。なお、内蔵ユニット22に含まれる軸受B1等の部材については、工作機械１から取り外されるため、外部において容易にメンテナンス作業を行うことができる。また、外装ユニット21に含まれるクランプスリーブ51等の部材については、内蔵ユニット22が取り外されることによって外装ユニット21の内部空間に露出した状態となるため、これらについてもメンテナンスが可能な状態となる。   More specifically, since it is not necessary to remove the motor stators M1b and M2b from the machine tool 1 during the maintenance work, the cable connected to the motor stators M1b and M2b and the wiring on the machine tool side are disconnected and reconnected. Work becomes unnecessary. As a result, maintenance work can be facilitated and time can be reduced. Note that the members such as the bearing B1 included in the built-in unit 22 are removed from the machine tool 1, so that maintenance work can be easily performed outside. In addition, the members such as the clamp sleeve 51 included in the exterior unit 21 are exposed to the internal space of the exterior unit 21 when the built-in unit 22 is removed, so that these can be maintained.

次に、図３〜図５に基づいて第二の支持ヘッド20の変形例を説明する。図３に示す第二の支持ヘッド20は、ハウジング30を構成する２つのハウジング部材31,32のうちの反回転駆動対象部材側のもの（第一ハウジング部材31）と蓋部材33とでケーシング部材30aを構成し、回転駆動対象部材側のもの（第二ハウジング部材32）と、係止スリーブ30c（先例の固定部材）とで固定部材30bを構成した例である。そして、駆動手段Ｍを構成する全ての駆動モータM1,M2のモータステータM1b,M2bを第一ハウジング部材31に固定して外装ユニット21を構成し、駆動モータM1,M2のモータロータM1ａ,M2aを回転軸40に固定すると共に、複数の軸受B1,B2を回転軸40と第二ハウジング部材32との間に介在させて内蔵ユニット22を構成してある。なお、殆ど距離をおかずに複数の駆動モータM1,M2をＣ軸方向に沿って直列的に配置し、各軸受B1,B2にはクロスローラベアリングを用いている。   Next, a modified example of the second support head 20 will be described with reference to FIGS. The second support head 20 shown in FIG. 3 is a casing member composed of the two housing members 31 and 32 constituting the housing 30 on the side opposite to the rotational drive target member (first housing member 31) and the lid member 33. 30a is an example in which the fixing member 30b is configured by the member on the rotation drive target member side (second housing member 32) and the locking sleeve 30c (fixing member of the previous example). Then, the motor stators M1b, M2b of all the drive motors M1, M2 constituting the drive means M are fixed to the first housing member 31 to constitute the exterior unit 21, and the motor rotors M1a, M2a of the drive motors M1, M2 are rotated. The built-in unit 22 is configured by being fixed to the shaft 40 and interposing a plurality of bearings B1 and B2 between the rotating shaft 40 and the second housing member 32. A plurality of drive motors M1 and M2 are arranged in series along the C-axis direction with almost no distance, and a cross roller bearing is used for each of the bearings B1 and B2.

図４に示す第二の支持ヘッド20は、これまでの例と同様に駆動手段Ｍを軸線方向に直列的に配置した複数の駆動モータM1,M2で構成したものであるが、反回転駆動対象部材側の駆動モータM1のモータステータM1bのみをケーシング部材30aの一部を形成する第一ハウジング部材31に固定して外装ユニット21を構成した例である。従って、図４に示す第二の支持ヘッド20では、先例と異なり、回転駆動対象部材側の駆動モータM2は、固定部材30bの一部を形成する第二ハウジング部材32と回転軸40との間に設けられたものとなっている。この場合、内蔵ユニット22を取り外す際には、回転駆動対象部材側のモータステータM2bからのケーブル（図示省略）の接続を解除する作業を要する。しかし、従来のように全ての駆動モータ（モータステータ）について上記作業を行うものと比べ、その作業の容易化及び時間短縮を図ることができる。   The second support head 20 shown in FIG. 4 is composed of a plurality of drive motors M1, M2 in which the drive means M is arranged in series in the axial direction as in the previous examples. This is an example in which the exterior unit 21 is configured by fixing only the motor stator M1b of the drive motor M1 on the member side to the first housing member 31 that forms a part of the casing member 30a. Therefore, in the second support head 20 shown in FIG. 4, unlike the previous example, the drive motor M2 on the rotation drive target member side is between the second housing member 32 and the rotary shaft 40 that form a part of the fixed member 30b. It has been provided. In this case, when removing the built-in unit 22, it is necessary to release the connection of the cable (not shown) from the motor stator M2b on the rotation drive target member side. However, it is possible to facilitate the work and reduce the time compared to the conventional case where the above work is performed for all the drive motors (motor stators).

図５に示す第二の支持ヘッド20は、駆動手段Ｍに相当する駆動モータM1として、モータロータM1aがモータステータM1bの外周を囲繞するように設けられた、所謂アウターロータ形のＤＤモータを採用した例である。図示の例では、回転軸40は、反回転駆動対象部材側を小径とし、その小径部41eを囲むようにして筒状部材41fを回転軸40に取り付け、回転軸40の先端部側に筒状空間41dを同心円状に形成している。そして、駆動モータM1のモータロータM1aを筒状空間41dの外周側、即ち、筒状部材41fの内周面に固定し、固定部材30bと共に内蔵ユニット22を構成している。   The second support head 20 shown in FIG. 5 employs a so-called outer rotor type DD motor in which the motor rotor M1a is provided so as to surround the outer periphery of the motor stator M1b as the drive motor M1 corresponding to the drive means M. It is an example. In the illustrated example, the rotation shaft 40 has a small diameter on the counter-rotation drive target member side, a cylindrical member 41f is attached to the rotation shaft 40 so as to surround the small diameter portion 41e, and a cylindrical space 41d is disposed on the distal end side of the rotation shaft 40. Are formed concentrically. The motor rotor M1a of the drive motor M1 is fixed to the outer peripheral side of the cylindrical space 41d, that is, the inner peripheral surface of the cylindrical member 41f, and the built-in unit 22 is configured together with the fixing member 30b.

一方、外装ユニット21を構成するためのケーシング部材30aは、内筒30dと外筒30eからなる二重管構造とし、同心円状に配置された外筒30eと内筒30dとが反回転駆動対象部材側において接合部33で繋がれた構造となっている。そして、内筒30dの外周面にモータステータM1bを固定して外装ユニット21を構成している。   On the other hand, the casing member 30a for constituting the exterior unit 21 has a double tube structure including an inner cylinder 30d and an outer cylinder 30e, and the outer cylinder 30e and the inner cylinder 30d arranged concentrically are anti-rotation driven members. On the side, the structure is connected by a joint 33. The exterior unit 21 is configured by fixing the motor stator M1b to the outer peripheral surface of the inner cylinder 30d.

この図５に示す第二の支持ヘッド20のように、本発明では、駆動手段Ｍに用いられる駆動モータは、インナーロータ形のＤＤモータに限らず、アウターロータ形のＤＤモータであっても良い。   In the present invention, like the second support head 20 shown in FIG. 5, the drive motor used for the drive means M is not limited to the inner rotor type DD motor, but may be an outer rotor type DD motor. .

そして、図５に示す第二の支持ヘッド20においても、内蔵ユニット22は、外装ユニット21に対し抜き差し可能となっている。より詳しくは、外装ユニット21の主体となるケーシング部材30aのＣ軸方向に延在する内周面、即ち、内筒30dの内周面及び外筒30eの内周面は、その内周面によって形成される内部空間に挿入される内蔵ユニット22の部分に対し、その各部の直径寸法が、それよりも反回転駆動対象部材側に位置する内蔵ユニット21における上記部分の外径寸法よりも大きく形成されている。具体的には、内筒30dの内周面については、その内部に挿入される回転軸40の小径部41eに対し、その各部の直径寸法が、それよりも反回転駆動対象部材側に位置する小径部41eの各部の外径寸法よりも大きく形成されている。また、外筒30eの内周面については、その内部に挿入される回転軸40（大径部）及び筒状部材41fに対し、その各部の直径寸法が、それよりも反回転駆動対象部材側に位置する回転軸40又は筒状部材41fの各部の外径寸法よりも大きく形成されている。   In the second support head 20 shown in FIG. 5, the built-in unit 22 can be inserted into and removed from the exterior unit 21. More specifically, the inner peripheral surface extending in the C-axis direction of the casing member 30a as the main body of the exterior unit 21, that is, the inner peripheral surface of the inner cylinder 30d and the inner peripheral surface of the outer cylinder 30e are defined by the inner peripheral surface. For the part of the built-in unit 22 to be inserted into the formed internal space, the diameter dimension of each part is formed larger than the outer diameter dimension of the above part in the built-in unit 21 located on the counter-rotation drive target member side. Has been. Specifically, with respect to the inner peripheral surface of the inner cylinder 30d, the diameter dimension of each part thereof is located closer to the counter-rotation drive target member side than the small-diameter part 41e of the rotating shaft 40 inserted therein. It is formed larger than the outer diameter of each part of the small diameter part 41e. Further, with respect to the inner peripheral surface of the outer cylinder 30e, the diameter dimension of each part with respect to the rotating shaft 40 (large diameter part) and the cylindrical member 41f inserted into the outer cylinder 30e is more anti-rotation driven member side. Is formed larger than the outer diameter of each part of the rotary shaft 40 or the cylindrical member 41f.

以上から、本発明では、外装ユニット21は、その内部においてＣ軸方向で内蔵ユニット22と対向する面を有していないとも言える。また、図５に示す例では、ケーシング部材30aと固定部材30bとを連結するためにフランジ接合を用いており、ネジ部材をＣ軸方向に平行に捩じ込んで両者を連結している。即ち、本発明においては、ケーシング部材30aと固定部材30bとの連結方法は特に限定しないものである。   From the above, in the present invention, it can be said that the exterior unit 21 does not have a surface facing the built-in unit 22 in the C-axis direction inside. Further, in the example shown in FIG. 5, flange joining is used to connect the casing member 30a and the fixing member 30b, and the screw members are screwed in parallel to the C-axis direction to connect them. That is, in the present invention, the method for connecting the casing member 30a and the fixing member 30b is not particularly limited.

なお、本発明は上記の実施形態に限定されない。例えば、ラム６と加工用ヘッド８（第二の支持ヘッド20）との連結構造について、図６に示すように、ラム６のヘッド取付部分6aをケーシング部材30aとして利用しても良い。詳しく言えば、内部に横断面円形の空間を有するヘッド取付部分6aをケーシング部材30aとして使用すると共に、その内周面に駆動モータのモータステータやクランプ機構等を固定して外装ユニット21を形成し、先例の第二の支持ヘッド20におけるハウジング部材31,32及び蓋部材33を省略したものとしても良い。そして、先例の係止スリーブ30cを固定部材30bとして使用してヘッド取付部分6aに連結するようにすれば良い。   In addition, this invention is not limited to said embodiment. For example, as shown in FIG. 6, the head mounting portion 6a of the ram 6 may be used as the casing member 30a for the connection structure between the ram 6 and the processing head 8 (second support head 20). Specifically, the head mounting portion 6a having a circular space in the inside is used as the casing member 30a, and the exterior unit 21 is formed by fixing the motor stator, the clamp mechanism, and the like of the drive motor on the inner peripheral surface thereof. The housing members 31 and 32 and the lid member 33 in the second support head 20 of the previous example may be omitted. Then, the preceding locking sleeve 30c may be used as the fixing member 30b to be connected to the head mounting portion 6a.

また、駆動手段を構成する駆動モータの個数は問わず、三個以上でも良い。また、図５の例では、ラム６に対し加工用ヘッド８を連結するために設けられたフランジを利用してケーシング部材30aと固定部材30bを接合するものであったが、加工用ヘッド８をラム６に接合するフランジとは別に専用のフランジをケーシング部材30aと固定部材30bに設けてフランジ接合するものであっても良い。   Further, the number of drive motors constituting the drive means is not limited and may be three or more. In the example of FIG. 5, the casing member 30 a and the fixing member 30 b are joined using a flange provided to connect the processing head 8 to the ram 6. In addition to the flange to be joined to the ram 6, a dedicated flange may be provided on the casing member 30a and the fixing member 30b to join the flange.

本発明の工作機械用の割出装置の断面図である。It is sectional drawing of the indexing device for machine tools of this invention. （イ）（ロ）図は、図１の組立て状態、分解状態を示す説明図である。(A) and (b) are explanatory views showing the assembled state and the disassembled state of FIG. （イ）（ロ）図は、第二の支持ヘッドの第一変形例における組立て状態、分解状態を示す説明図である。(A) and (B) are explanatory views showing an assembled state and a disassembled state in the first modified example of the second support head. （イ）（ロ）図は、第二の支持ヘッドの第二変形例における組立て状態、分解状態を示す説明図である。(A) and (B) are explanatory views showing an assembled state and a disassembled state in the second modified example of the second support head. （イ）（ロ）図は、第二の支持ヘッドの第三変形例における組立て状態、分解状態を示す説明図である。(A) and (B) are explanatory views showing an assembled state and a disassembled state in a third modification of the second support head. ラムと加工用ヘッドとの連結構造の第一変形例を示す片側断面図である。It is a half sectional view which shows the 1st modification of the connection structure of a ram and the processing head. ラムと加工用ヘッドの組立て状態を示す説明図である。It is explanatory drawing which shows the assembly state of a ram and the processing head. 軸受の構造を示す断面図である。It is sectional drawing which shows the structure of a bearing. 工作機械の全体を示す斜視図である。It is a perspective view which shows the whole machine tool.

符号の説明Explanation of symbols

１工作機械、２ベッド、３コラム、４クロスレール、５サドル、６ラム、
6aヘッド取付部分、７テーブル、８加工用ヘッド、９スピンドル、
10スピンドルユニット、11第一の支持ヘッド、12基部、13ケース、14脚部、
20第二の支持ヘッド、21外装ユニット、22内蔵ユニット、
30ハウジング、30aケーシング部材、30b固定部材、30c係止スリーブ、30d内筒、
30e外筒
31第一ハウジング部材、31a本体、31b第一ハウジングスリーブ、31c外向窓、
32第二ハウジング部材、32a本体、32b第二ハウジングスリーブ、33接合部材
c1コネクタ、c11ケーブル、H1ケーブル用配線孔、
c2コネクタ、c21ケーブル、H2ケーブル用配線孔、
40回転軸、
41第一軸部材、41a本体、41b第一外スリーブ、41c第一内スリーブ、41d筒状空間、
41e小径部、41f筒状部材、
42第二軸部材、42a本体、42b第二外スリーブ、42c第二内スリーブ、42d凹部、
42eフランジ部材、42f連結部材、
50クランプ機構、51クランプスリーブ、51a厚肉部、51b薄肉部、52受圧部材、
53圧力室、54流体通路、54a出口部、
B1軸受、B2軸受、B1a内輪、B1b外輪、B1c円筒ころ、
Ｍ駆動手段、
M1駆動モータ、M1aモータロータ、M1bモータステータ、M1cステータスリーブ、
M2駆動モータ、M2aモータロータ、M2bモータステータ、M2cステータスリーブ、 1 machine tool, 2 beds, 3 columns, 4 cross rails, 5 saddles, 6 rams,
6a head mounting part, 7 tables, 8 machining heads, 9 spindles,
10 spindle units, 11 first support head, 12 bases, 13 cases, 14 legs,
20 second support head, 21 exterior unit, 22 built-in unit,
30 housing, 30a casing member, 30b fixing member, 30c locking sleeve, 30d inner cylinder,
30e outer cylinder
31 first housing member, 31a body, 31b first housing sleeve, 31c outward window,
32 second housing member, 32a body, 32b second housing sleeve, 33 joint member
c1 connector, c11 cable, H1 cable wiring hole,
c2 connector, c21 cable, H2 cable wiring hole,
40 rotation axes,
41 first shaft member, 41a body, 41b first outer sleeve, 41c first inner sleeve, 41d cylindrical space,
41e small diameter part, 41f cylindrical member,
42 second shaft member, 42a body, 42b second outer sleeve, 42c second inner sleeve, 42d recess,
42e flange member, 42f connecting member,
50 clamp mechanism, 51 clamp sleeve, 51a thick part, 51b thin part, 52 pressure receiving member,
53 pressure chamber, 54 fluid passage, 54a outlet,
B1 bearing, B2 bearing, B1a inner ring, B1b outer ring, B1c cylindrical roller,
M driving means,
M1 drive motor, M1a motor rotor, M1b motor stator, M1c stator sleeve,
M2 drive motor, M2a motor rotor, M2b motor stator, M2c stator sleeve,

Claims (1)

スピンドルユニット（10）を角度調整可能な状態で回転可能に支持する第一の支持ヘッド（11）が一端に固定される回転軸（40）と、該回転軸（40）を支持するために前記回転軸（40）の外周を少なくとも囲むと共に工作機械本体に着脱可能なハウジング（30）と、該ハウジング（30）と前記回転軸（40）との間に設けられる軸受（B1、B2）と、前記ハウジング（30）と前記回転軸（40）との間に設けられると共に前記回転軸（40）を回転させるために前記回転軸（40）の周りに同心円状に配置されたモータロータ（M1a）及びモータステータ（M1b）からなる駆動モータ（M1）を備える駆動手段（Ｍ）であって前記モータステータ（M1b）が前記ハウジング（30）に固定されると共に前記モータロータ（M1a）が前記回転軸（40）に固定された駆動手段（Ｍ）と、前記駆動手段（Ｍ）によって回転されて角度位置が割り出された前記回転軸（40）を回転不能に保持するクランプ機構（50）とを含む工作機械用の割出装置において、
前記ハウジング（30）は、前記軸受（B1、B2）を前記回転軸（40）との間に介在させる前記第一の支持ヘッド（11）側の固定部材（30b）と、前記回転軸（40）の軸線方向に関し該固定部材（30b）に対し前記第一の支持ヘッド（11）とは反対側に位置すると共に前記モータステータ（M1b）が固定されるケーシング部材（30a）とから成り、前記ケーシング部材（30a）を前記固定部材に着脱可能に連結して構成されており、
前記駆動手段（Ｍ）は、前記回転軸（40）の軸線方向に沿って複数の前記駆動モータ（M1)を直列的に配置して構成されており、
前記回転軸（40）、前記軸受（B1、B2）、前記各駆動モータ（M1）の前記モータロータ（M1a）及び前記固定部材（30b）を組み付けて内蔵ユニット（22）を構成すると共に、前記ケーシング部材（30a）と少なくとも前記第一の支持ヘッド（11）とは反対側に配置された前記駆動モータ（M1）の前記モータステータ（M1b）とを組み付け且つ前記モータステータ（M1b）に接続するケーブル（c11）を前記固定部材（30b）に対して前記第一の支持ヘッド（11）とは反対側から引き出すことによって外装ユニット（21）を構成し、
前記内蔵ユニット（22）は、前記外装ユニット（21）に対し、前記第一の支持ヘッド（11）を前記回転軸（40）に固定したまま前記第一の支持ヘッド（11）側から抜き差し可能に連結されている、
ことを特徴とする工作機械用の割出装置。
 Wherein in order to support the rotary shaft to which the first support head for rotatably supporting the spindle unit (10) at an adjustable angle state (11) is fixed to one end (40), said rotary shaft (40) a removable housing machine tool body together with the outer periphery at least surround the rotating shaft (40) (30), a bearing (B1, B2) provided between said housing (30) and said rotary shaft (40), said motor rotor being disposed concentrically about an axis of rotation (40) (M1a) and said rotary shaft (40) to rotate together with the provided between the housing (30) and said rotary shaft (40) Drive means (M) comprising a drive motor (M1) comprising a motor stator (M1b), wherein the motor stator (M1b) is fixed to the housing (30) and the motor rotor (M1a) is connected to the rotating shaft (40). Drive means (M) fixed to An indexing device for a machine tool , including a clamp mechanism (50) that holds the rotating shaft (40) rotated by the driving means (M) and whose angular position is indexed so as not to rotate .
It said housing (30) has a front SL bearing the is interposed between the (B1, B2) of the rotary shaft (40) first support head (11) side of the fixed member (30b), said rotating shaft ( relates axial 40) become from the casing member (30a) of said motor stator (M1b) is fixed with on the opposite side to the relative said fixing member (30b) the first support head (11), The casing member (30a) is configured to be detachably connected to the fixing member,
The drive means (M) is configured by arranging a plurality of the drive motors (M1) in series along the axial direction of the rotating shaft (40),
The rotary shaft (40) , the bearings (B1, B2) , the motor rotor (M1a) and the fixing member (30b) of each drive motor (M1 ) are assembled to form a built-in unit (22), and the casing member (30a) and at least the cable first and support head (11) connected to said motor stator (M1b) and the assembly and the motor stator of the drive motor disposed on the opposite side (M1) (M1b) The exterior unit (21) is configured by pulling out (c11) from the side opposite to the first support head (11) with respect to the fixing member (30b) ,
The built-in unit (22) can be inserted into and removed from the first support head (11) side while the first support head (11) is fixed to the rotating shaft (40) with respect to the exterior unit (21). Connected to
An indexing device for machine tools.
JP2007175080A 2007-07-03 2007-07-03 Indexing device for machine tools Active JP5081513B2 (en)

Priority Applications (8)

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JP2007175080A JP5081513B2 (en) 2007-07-03 2007-07-03 Indexing device for machine tools
TW097120732A TW200902221A (en) 2007-07-03 2008-06-04 Index device for machine tool
KR1020097025424A KR101362830B1 (en) 2007-07-03 2008-07-01 Index device for machine tool
CN2008800128506A CN101687291B (en) 2007-07-03 2008-07-01 Index device for machine tool
PCT/JP2008/061888 WO2009005051A1 (en) 2007-07-03 2008-07-01 Index device for machine tool
US12/602,849 US8579560B2 (en) 2007-07-03 2008-07-01 Index device for machine tool
EP08777739A EP2168713B1 (en) 2007-07-03 2008-07-01 Index device for machine tool
AT08777739T ATE553878T1 (en) 2007-07-03 2008-07-01 DIVIDER DEVICE FOR MACHINE TOOLS

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EP2168713B1 (en) 2012-04-18
CN101687291B (en) 2013-05-22
KR20100029085A (en) 2010-03-15
JP2009012102A (en) 2009-01-22
ATE553878T1 (en) 2012-05-15
US8579560B2 (en) 2013-11-12
WO2009005051A1 (en) 2009-01-08
US20100178125A1 (en) 2010-07-15
EP2168713A1 (en) 2010-03-31
EP2168713A4 (en) 2011-04-06
CN101687291A (en) 2010-03-31
TW200902221A (en) 2009-01-16
KR101362830B1 (en) 2014-02-21

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